In a week’s timespan the Lake Tahoe Basin will experience a record high and fresh snow.

On Nov. 9, South Lake Tahoe had a high of 69 degrees, which broke the record by six degrees. The previous record was set in 2003 and 1995.

Marvin Boyd, meteorologist with the National Weather Service in Reno, said it was unusual for a record to be broken so substantially, adding normally it’s only by a degree or two.

Reno also set a record on Sunday with a high of 76 degrees. The old record of 73 had been set in 1990, 1941 and 1913.

A high pressure system off the California coast is bringing the unseasonably warm weather to the region.

“What made the high pressure so big is there was a massive low pressure in the Gulf of Alaska,” Boyd told Lake Tahoe News. “When you get those big pressure changes like that it affects everything downstream.”

Temperatures will return to normal this week, with highs in the 50s in Tahoe.

A small system will move through the area on Wednesday, but Boyd said snow should only be falling at the higher peaks. It will be rain at lake level.

— Lake Tahoe News staff report